How can we determine the source of increased CO2 in the air?

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Many of the folks that fight for environmental causes speak with such authority on the matter that you’d think they were experts and that they had complete and utter proof that their theories were right on the money. The truth is that all we have to go on at this point is theory. Of course, those theories are pretty good and it might not matter much anyway.

Since the Industrial Revolution CO2 emissions are up by a whole lot. It stands to reason then that the burning of fossil fuels is what causes the increase. Some people don’t believe that’s true though. Some think it’s merely a natural thing as the Earth’s population grows and there’s nothing you can do about it or should do about it. We can assume though that CO2 emissions are up because there’s more pollutant being emitted from human beings than ever before.